I have this old Stuart Turner Torpedo Boat Destroyer that has a Stuart No.2 Torpedo Boat Engine. The plan above shows an electric motor, but the model is live steam and I wonder if this boat was ever able to sail on water. The Note on the plan describes the importance of making the centre of gravity as low as possible, and I find that impossible with a boiler and very heavy engine. Also, isn't this smallish spirit heated boiler far too small for a twin with 3/4" x 3/4" cylinders?
Sep 12, 2018
If you hang around this forum long enough you will see mention of Tubal Cain's "Building Simple Model Steam Engines". It's a fantastic book and even if you have no intention of building things for yourself it will greatly help you to understand how toy steam engines are constructed and work. But I do build things for myself. There is a very well equipped model engineering workshop here at Henry Towers that sees activity most days. Most of the projects I have been working on over the last couple of years have been fairly complex so I thought it would make a nice change of pace to build something simple. Polly is about as simple as they come. The nice thing about Tubal Cain's engines is that they are very easy to modify to suit the tastes and available materials and tools of the builder. Building an engine like Polly also means that I get to play with all the toys in the workshop. So here is my version of Polly - erm… "Polly-esque"... "Polly-ish"... "Polly 2.0"? Just need to clean up a few parts and stick them together...